#!/usr/bin/env python3
# Copyright (c) 2008 Google, Inc.
# Contributed by Arun Sharma <arun.sharma@google.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#

import os
from perfmon import *


def public_members(self):
    ans = "{ "
    for k, v in self.__dict__.items():
        if not k[0] == '_':
            ans += "%s : %s, " % (k, v)
    ans += " }"
    return ans


class System:
    # Use the os that gives us everything
    os = PFM_OS_PERF_EVENT_EXT

    def __init__(self):
        self.ncpus = os.sysconf('SC_NPROCESSORS_ONLN')
        self.pmus = []
        for i in range(0, PFM_PMU_MAX):
            try:
                pmu = PMU(i)
            except:
                pass
            else:
                self.pmus.append(pmu)

    def __repr__(self):
        return public_members(self)


class Event:
    def __init__(self, info):
        self.info = info
        self.__attrs = []

    def __repr__(self):
        return '\n' + public_members(self)

    def __parse_attrs(self):
        info = self.info
        for index in range(0, info.nattrs):
            self.__attrs.append(pfm_get_event_attr_info(info.idx, index,
                                                        System.os)[1])

    def attrs(self):
        if not self.__attrs:
            self.__parse_attrs()
        return self.__attrs


class PMU:
    def __init__(self, i):
        self.info = pfm_get_pmu_info(i)[1]
        self.__events = []

    def __parse_events(self):
        index = self.info.first_event
        while index != -1:
            self.__events.append(Event(pfm_get_event_info(index, System.os)[1]))
            index = pfm_get_event_next(index)

    def events(self):
        if not self.__events:
            self.__parse_events()
        return self.__events

    def __repr__(self):
        return public_members(self)


if __name__ == '__main__':
    from perfmon import *

    s = System()
    for pmu in s.pmus:
        info = pmu.info
        if info.flags.is_present:
            print(info.name, info.size, info.nevents)
            for e in pmu.events():
                print(e.info.name, e.info.code)
                for a in e.attrs():
                    print('\t\t', a.name, a.code)
